Features: Adopting high specification craft, carefully welding, precise hole position, complete functions. The installation is simple and does not require particularly complicated operations. Color screen, new custom buttons, add battery-powered charging circuit, low power consumption. This product is made of high quality PCB material, strong and durable. Suitable for development board, it can interact with many software such as for Processing, for Max/MSP, for Pure Data, for VVVV. Specification: Item Type: Development Board Material: PCB Size: Approx. 51.52 x 25.04 x 8.54mm / 2.03 x 0.99 x 0.34inch Weight: Approx. 7.81g / 0.3oz Hardware Specifications: Chipset: For ESPRESSIF-ESP32 240MHz Xtensa? single-/dual-core 32-bit LX6 microprocessor Flash: For QSPI flash 4MB SRAM: 520 kB SRAM Button: Reset USB to TTL: CP2104 Modular Interface: UART, SPI, SDIO, I2C, LED PWM, TV PWM, I2S, IRGPIO, ADC, capacitor touch sensor, DACLNA pre-amplifier Display: IPS ST7789V 1.14 Inch Working Voltage: 2.7V-4.2V Working Current: Approx. 60MA Sleep Current: Approx. 120uA Working Temperature Range: -40℃-+85℃ Power Supply Specifications: Power Supply: USB 5V/1A Charging Current: 500mA Battery: 3.7V lithium battery JST Connector: 2Pin 1.25mm/0.05inch Wi-Fi Standard: FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC(esp32 chip) Protocol: 802.11 b/g/n (802.11n, speed up to 150Mbps) A-MPDU and A-MSDU polymerization, support 0.4μS Protection interval Frequency Range: 2.4GHz-2.5GHz (2400M-2483.5M) Transmit Power: 22dBm Communication Distance: Approx. 300m / 984.25ft Bluetooth Protocol: Meet Bluetooth v4.2BR/EDR and BLE standard Radio Frequency: With -97dBm sensitivity NZIF receiver Class-1, Class-2&Class-3 emitter AFH Audio Frequency: CVSD&SBC audio frequency Software Specification: Wi-Fi Mode: Station/SoftAP/SoftAP+Station/P2P Security Mechanism: WPA/WPA2/WPA2-Enterprise/WPS Encryption Type: AES/RSA/ECC/SHA Firmware Upgrade: UART download/OTA(Through network/host to download and write firmware) Software Development: Support cloud server development /SDK for user firmware development Networking Protocol: IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT User Configuration: AT + Instruction set, cloud server, for Android/iOS app OS: For FreeRTOS Package List: 1 x Module 2 x Pin 1 x Connect Cable .